Preparation and Characterization of Polyphenylene Sulfide–based Chelating Resin–functionalized 2‐amino‐1,3,4‐thiadiazole for Selective Removal Hg(II) from Aqueous Solutions

A novel chelating resin (PPS‐ATD) containing N and S elements was prepared through the chloromethylation of polyphenylene sulfide resin and subsequent functionalization with 2‐amino‐1,3,4‐thiadiazole (ATD). The structure of PPS‐ATD was systematically characterized and analyzed by the Fourier transform infrared spectroscopy, elemental analysis, thermogravimetric analysis, scanning electron microscope, and energy dispersive spectrometer. The adsorption performance of PPS‐ATD was evaluated by batch methods at different pH, temperature, adsorption time, and initial concentration, and the results showed that the PPS‐ATD exhibited high adsorption capacity (197.79 mg·g−1 at 298 K) and selectivity for Hg(II). The adsorption of PPS‐ATD for Hg(II) was well fitted by the Langmuir isotherm model, and the adsorption process was endothermic. After 5 consecutive regeneration cycles, no obvious loss in the adsorption capacity of the PPS‐ATD was found, which implied that the PPS‐ATD had great application prospects in the treatment of mercury‐containing wastewater.